MovieSceneQuaternionBlenderSystem.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Containers/SortedMap.h"
#include "EntitySystem/MovieSceneBlenderSystem.h"
#include "EntitySystem/MovieSceneCachedEntityFilterResult.h"
#include "EntitySystem/MovieSceneDecompositionQuery.h"
#include "EntitySystem/MovieSceneEntitySystem.h"
 
#include "MovieSceneQuaternionBlenderSystem.generated.h"
 
namespace UE::MovieScene
{
    struct FQuatTransform
    {
        FVector Translation;
        FQuat Rotation;
        FVector Scale;
    };
 
    struct FQuaternionBlenderAccumulationBuffers
    {
        TSparseArray<double> AbsoluteWeights;
        TArray<FQuatTransform> Absolutes;
        TArray<FQuatTransform> Additives;
    };
}
 
UCLASS(DisplayName="Shortest Rotation (quaternion slerp)", meta=(Tooltip="Uses a quaternion spherical interpolation (slerp) to blend between transforms using the shortest rotation path. Does not support over-rotation."), MinimalAPI)
class UMovieSceneQuaternionBlenderSystem : public UMovieSceneBlenderSystem, public IMovieSceneValueDecomposer
{
public:
    GENERATED_BODY()
 
    MOVIESCENETRACKS_API UMovieSceneQuaternionBlenderSystem(const FObjectInitializer& ObjInit);
 
    MOVIESCENETRACKS_API virtual void OnSchedulePersistentTasks(UE::MovieScene::IEntitySystemScheduler* TaskScheduler) override;
    MOVIESCENETRACKS_API virtual void OnRun(FSystemTaskPrerequisites& InPrerequisites, FSystemSubsequentTasks& Subsequents) override;
 
    MOVIESCENETRACKS_API virtual FGraphEventRef DispatchDecomposeTask(const UE::MovieScene::FValueDecompositionParams& Params, UE::MovieScene::FAlignedDecomposedValue* Output) override;
 
private:
 
    UE::MovieScene::FQuaternionBlenderAccumulationBuffers Buffers;
};